<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<view class="scorll-view-container">
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="left-scroll-view">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="right-scroll-view" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in catelevel2" :key="i2">
					<view class="cate-lv2-title">
						/{{item2.cat_name}}/
					</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3"
							@click="gotoGooddeList(item3)">
							<image :src="item3.cat_icon" mode=""></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				wh: 0,
				cateList: [],
				active: 0,
				catelevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysinfo = uni.getSystemInfoSync()
			this.wh = sysinfo.windowHeight - 50
			this.getcateList()
		},
		methods: {
			async getcateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				this.catelevel2 = res.message[0].children
			},
			activeChanged(i) {
				this.active = i
				this.catelevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotoGooddeList(item3) {
				uni.navigateTo({
					url: "/subpkg/goods_list/goods_list?cid=" + item3.cat_id
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scorll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;

				&.active {
					background-color: #ffffff;
					position: relative;

					&:before {
						content: "";
						display: block;
						width: 3px;
						height: 30rpx;
						background-color: #c00000;
						position: absolute;
						left: 0;
						top: 50%;
						transform: translateY(-50%);
					}
				}
			}
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}

	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;

		.cate-lv3-item {
			width: 33.33%;
			display: flex;
			flex-direction: column;
			align-items: center;
			margin-bottom: 10px;
		}

		image {
			width: 60px;
			height: 60px;
		}

		text {
			font-size: 12px;
		}

	}
</style>